How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the lighting system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 
3. INSPECT BATTERY VOLTAGE 

   Standard voltage: 11 to 14 V 

   If the voltage is below 11 V, recharge or replace battery before proceeding.

4. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally.

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      MPX DTC is not output	A
      MPX DTC is output	B

   B:  GO TO MULTIPLEX COMMUNICATION SYSTEM

   A: Go to next step. 

5. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   If fault is not listed in problem symptoms table	A
   If fault is listed in problem symptoms table	B

   B:  Go to step  7

   A: Go to next step. 

6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. See TERMINALS OF ECU 
   2. See DATA LIST / ACTIVE TEST 
7. REPAIR OR REPLACE 
8. CONFIRMATION TEST 

   NEXT: END